摘要
通过田间点源入渗试验,研究了田间点源入渗土壤水盐分布特征,得出以下结论:①滴头下方距滴头距离较近的区域,滴头流量较小的处理土壤含盐量较小;距滴头距离较远的区域,滴头流量较大的处理土壤含盐量较小。水平方向土壤含盐量变化相似;②表层土壤盐分随着入渗时间的增加而减小。滴头下方土壤含盐量总体上随着入渗水量的增加而减小,入渗水对土壤中的盐分的淋洗效率和压盐深度均与入渗时间成正比。
By means of point source infiltration tests in the fields, research is done on water and satt distribution point source infiltration tests in the fields. The following conclusions are drawn：（1）In the region of the dripping bottom and close distance, the small emitter soil salt is less; in the faraway area from the emitter ,larger emitter flow soil salinity is smaller. The soil salinity changes simi- larly in the level direction; （2）the surface soil salinity increases as the infiltration time. The soil salinity emitter below is reduced along with the increase in water. The efficiency of water seepage into the soil salt and the depth of infiltration is proportional to time.
出处
《中国农村水利水电》
北大核心
2009年第4期31-34,38,共5页
China Rural Water and Hydropower
基金
国家自然科学基金资助项目"内陆干旱区人工绿洲水盐动态研究与预测"(50669007)
关键词
点源入渗
水盐分布
淋洗效率
灌水量
point source infiltration
distribution of water and salt
leaching efficiency
irrigation
